Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - MPGuino rebooting and freezing also... Power issue?

tygertec · 07-24-2009, 04:26 PM

I tested the voltage regulator with a voltmeter. With the car off, it was reading +11.9V on the input side and +4.95V on the output side. With the car on (and the unit frozen I might add), input V was +13.5V and output a steady +4.95V.

I know output is supposed to be +5.1V. Is 4.95 a teensy weensy bit too low?

Also, I just performed the tests outlined here:

Mpguino tests - EcoModder

and here are the results:

A-B Inf
A-C Inf (Interesting. Not grounded?)
A-D 49.K (supposed to be INF. short?)

B-A 13.43M (yes, M)
B-C Inf
B-D 14M (That can't be good)

C-A Inf
C-B Inf
C-D Inf

D-A 48.9K (why so low?)
D-B Inf (Weird. B-D is 14M. Hmmm...)
D-C Inf

1-2 5M
1-3 5M
2-1 17.16M
2-3 10.54K
3-1 Keeps going up. Now around 18M.
3-2 10.54K

So I feel like these tests indicate that there's some kind of problem on the board. A visual inspection made my me doesn't reveal anything obvious. Perhaps one of the components is blown.

07-24-2009, 04:26 PM	#12 (permalink)
tygertec EcoModding Lurker Join Date: Jul 2009 Location: Eureka, CA Posts: 16 Daisy - '90 Toyota Corolla DX 90 day: 43.82 mpg (US) Thanks: 2 Thanked 0 Times in 0 Posts	I tested the voltage regulator with a voltmeter. With the car off, it was reading +11.9V on the input side and +4.95V on the output side. With the car on (and the unit frozen I might add), input V was +13.5V and output a steady +4.95V. I know output is supposed to be +5.1V. Is 4.95 a teensy weensy bit too low? Also, I just performed the tests outlined here: Mpguino tests - EcoModder and here are the results: A-B Inf A-C Inf (Interesting. Not grounded?) A-D 49.K (supposed to be INF. short?) B-A 13.43M (yes, M) B-C Inf B-D 14M (That can't be good) C-A Inf C-B Inf C-D Inf D-A 48.9K (why so low?) D-B Inf (Weird. B-D is 14M. Hmmm...) D-C Inf 1-2 5M 1-3 5M 2-1 17.16M 2-3 10.54K 3-1 Keeps going up. Now around 18M. 3-2 10.54K So I feel like these tests indicate that there's some kind of problem on the board. A visual inspection made my me doesn't reveal anything obvious. Perhaps one of the components is blown.